Grace G-707
Quad Master Stereo Tonearm.
Description
Developed especially for 4-channel records, the G-707 is an ultra light weight semi-integrated pick-up arm.
It embodies the quality of the Grace integrated Sigma 709 arm coupled with the versatility of the Grace G840 arm.
When used with a 4-channel stereo cartridge, or a high compliance cartridge, the G707 gives the superb reproduction available only from an integrated pick-up arm.
The use of a 6mm diameter light alloy pipe specially hard finished for good appearance, eliminates unwanted resonances.
In order not to distort the mid frequencies, because of dead mass, the arm is provided with a non-interchangeable acrylic head shell.
This is an integral part of the entire arm, however, changing cartridges can still be easily changed.
A high precision double gimbal pivot refined over 10 years of manufacturing experience is used on the G-707.
The gimbals now use aircraft instrument micro pivot bearings to reduce friction resistance to less than 20 milligrams.
The balancing of the arm is done by sliding and turning the weights in steps of 0.1g.
Also, by use of the slide feature, cartridges varying in total weight between 4.5 and 12.5g can be perfectly adjusted.
An arm director, which was formerly supplied as an optional accessory, has been incorporated, resulting in a smooth positive lowering motion.
A bias adjuster is also incorporated, and used both the rotating lever and weighted string principle to achieve perfect tracing of the record grooves.
Specifications
Overall length: 313mm
Effective length: 237mm
Arc of movement: approx 80 degrees
Stylus overhang: 15mm
Bearing friction: less than 20mg
Stylus pressure adjustments: 0.1g
Suitable cartridge weight: 4.5 to 12g
Review
The Grace G 707 had a tight, extended and powerful bass register, with accurate placement, while stereo was detailed with good depth and precision - £144 HiFi Choice 1984
Downloads
instruction/owners manual (en)
mkII instruction/owners manual (en)
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Grace G-707 / G707 owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are copyright the Vinyl Engine and provided under strict licence. Reproduction for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Grace.
Comments
Easy mod for Grace 707
Submitted on November 17th, 2009 by rguthrie1956You might want to try judicious use of blu-tack on the armtube on both sides of the pivot, close to the pivot. I've done this with a Denon DL-301 and a Goldring Eroica LX and found it to tighten up the bass considerably, and extend the airiness and image of my system. Don't go hog wild with it and experiment with placement. I found it best on the lower side of the arm.
rguthrie1956
Stereo cartridge use in a quadmaster tonearm?
Submitted on April 29th, 2009 by LJPerryThis question will quickly demonstrate my naivete, but I must ask. Is there any issue using a normal stereo two channel cartridge with the G-707 quadmaster tonearm?
Re: Stereo cartridge use in a quadmaster tonearm?
Submitted on April 29th, 2009 by whirlyvinylDepends on what is meant by normal. The wiring is compatible with stereo carts. The arm is lightweight, so normal for this arm would likely translate to medium-to-high compliance carts. It would probably be a poor choice for use with many modern moving coil carts of medium-to-low compliance. It ought to work well with Grados, Shures and ADCs.
grace 704 tonearm manual,707 manual
Submitted on October 24th, 2008 by BABIEthese arms are going on either my thorens td 125 or 150 turntables i have aquired, would you believe it from rubbish dumps that somebody had thrown away. thanks for the manuals, greatly appreceated. many thanks
Grace 704 & 707
Submitted on April 28th, 2009 by Bill L.How interesting:seems so much can be retrieved from tips,skips,brothers-in-law,garage and boot sales for no money.Don't be a self-conscious t..t come clean.